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Off-Balance Sheet Activities (Tables)
12 Months Ended
Dec. 31, 2016
Fair Value Disclosures [Abstract]  
Schedule of contractual amount of financial instruments with off-balance sheet risk

The contractual amount of financial instruments with off-balance sheet risk was as follows at December 31:

 

    2016   2015  
    Fixed   Variable   Fixed   Variable  
(Dollars in thousands)   Rate   Rate   Rate   Rate  
                     
Unused lines of credit and letters of credit   $ 9,219     $ 38,422     $ 14,445     $ 77,089  
Commitments to fund loans (at market rates)     16,788       3,005       18,654       1,740